I’ve used several models of Klipsch speakers -but not your specific units. I’ve found that some image best with extreme toe in. Others sound best with none. I assume you’ve tried it with no toe in. Try the extreme toe in. Point the left speaker at your right shoulder. Reversed for the other side. This makes the horns sound field cross well in front of you. It should image better in this configuration than any lesser toe in. Also getting them 3 feet or so from the back wall helps. I hope that gets you what you’re after.
Trying to get Sound Stage with Klipsch Tower Speakers
I have Klipsch RP-8000F speakers and do not get decent soundstage. The vocals seem well-located between the speakers. I have paired subwoofers for bass, and therefore no problem. Piano, violin, brass seem to emanate from either the right or left speaker. I've tried toe-in and varying speaker position without success. In my other system I use KEF LS50 Meta's and the superiority of soundstage is stunning. I would appreciate all helpful suggestions.